Amarok refuses to update collection

[Patrick O'Callaghan]

amarok-2.2.2-3.fc12.x86_64, KDE 4.3.5, F12.

I added an album of MP3 tracks to my music directory, but Amarok doesn't
seem to see it, neither automagically nor via an explicit Tools->Update
Collection. The tracks are all appropriately tagged, but not even
restarting Amarok nor logging in and out of my session will persuade it
to see them.

Any thoughts?

poc